Loopback plug.???

gouki2005

Ok I got my WO for my mission field saturday but I dont understand this info I dont want to bother my boss so if you know it tell what is this? What I going to do with this? first time I see this

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Comments

networker050184

Are you asking what a loopback plug is? If so, its a jack that wires the tx to rx so the link can be artificially brought up.

Just to add, if you don't know something you should definitely ask someone at work. Better to ask the stupid question than end up messing the job up because you were too scared to ask.

YFZblu

Let me google that for you

lantech

networker050184 wrote: »

Just to add, if you don't know something you should definitely ask someone at work. Better to ask the stupid question than end up messing the job up because you were too scared to ask.

This is great advice. Take it to heart.

Just had to give rep for it.

MAC_Addy

gouki2005 wrote: »

Ok I got my WO for my mission field saturday but I dont understand this info I dont want to bother my boss so if you know it tell what is this? What I going to do with this? first time I see this

Like Networker said, ask your boss. It's better to ask a stupid question then look stupid in front of a customer. Are you CCNA certified? If you've worked in the networking field for a while then I'm very surprised that you've never seen a loopback plug.

I have about 5 or 6 of them in my tool bag just in case I need to do some troubleshooting.

FloOz

Seems like pretty good instructions to me. I may even make my own now

Roguetadhg

ThinkGeek :: Universal Network Cable

ROLLED: Connect a host to a Cisco router or switch
CROSSOVER: Communicate directly between computers without a hub or switch
STRAIGHT-THROUGH: Use as a standard RJ45 patch cable
ATM/LOOPBACK: Test if a network card is working by checking for link lights with no need for a hub or switch
T1: Connect to DDS lines / T1 trunk lines

Win.

Wow, a USB SNES controller. Oh hell. Where's those classic games at. Super Mario World!

~ Oh heck, if they came out with a Genesis USB controller. I'll never get my cisco certs. And I can toss Skyrim out the digital window too.

And a Binary Clock!

...:'(

FloOz

@Rogue: That is AWESOME!!!! Could be a very useful tool to own.

Patel128

@Roguetadhg - That is genius. Now I want one of them and an LED binary clock. No lab is finished without a binary clock.

lantech

I wouldn't want to leave that anywhere though. Kiss the 29 bucks goodbye LOL

mapletune

that's pretty cool, =D be sure to carry a straight through patch with you though... or kiss goodbye to rollover and T1 features XD

m3zilla

MAC_Addy wrote: »

Like Networker said, ask your boss. It's better to ask a stupid question then look stupid in front of a customer. Are you CCNA certified? If you've worked in the networking field for a while then I'm very surprised that you've never seen a loopback plug.

I have about 5 or 6 of them in my tool bag just in case I need to do some troubleshooting.

I've been in the field for about 3 years...and I've never seen one either! We have a separate department that handles cabling/racking stuff in our datacenter so we don't do much L1 work.

johnifanx98

gouki2005 wrote: »

Ok I got my WO for my mission field saturday but I dont understand this info I dont want to bother my boss so if you know it tell what is this? What I going to do with this? first time I see this

Interesting. I learned something new. An ethernet loopback should be a self-crossover. That means wire 1 to 3, and 2 to 6. But for T1 loopback plug, it's 1-4 and 2-5. Do not use the one recommended by Rogue

His is for ethernet loopback...

Roguetadhg

Couldn't tell ya. I just keep losing my stubby cables to do testing. I tried connecting them to rj-45 joiners, and they have legs. Im left with a crossover and a small roll over $:\$

My original eithernet lo got lost in the shuffle somewhere! I even had the wiring wrapped.